Nan'an in context: Street-network sprawl trends

Nan'an in context

23456<19751976–19901991–20052006–2020SNDi of street additions
23456<19751976–19901991–20052006–2020SNDi of entire street network
Nan'anChongqing (Region)China (Country)

The chart above shows SNDi trends for new street additions (left panel) and the entire network (right panel), with Nan'an plotted against Chongqing and China. All three follow the same trend in new construction, suggesting a shared regional pattern of development. Most recently, Nan'an's incremental SNDi rose from 2.38 to 3.37 between 1991-2005 and 2006-2020. In terms of the aggregate network, Nan'an ranked 21st out of 47 cities in Chongqing and 1139th out of 1843 in China as of 2020.

New Street Additions (2006–2020)

SNDi value
3.37
Rank in China
1094th of 1843
Rank in Chongqing
18th of 47

Entire Network (Aggregate)

SNDi value
3.15
Rank in China
1139th of 1843
Rank in Chongqing
21st of 47

Rankings go from most connected to most disconnected — rank 1 is the most connected.

What about similarly populated cities?

2468<19751976–19901991–20052006–2020SNDi of street additions
2468<19751976–19901991–20052006–2020SNDi of entire street network
Nan'anSibolgaLubin

While Sibolga and Lubin both built increasingly disconnected streets over time, Nan'an fluctuated in its street-construction patterns in new street additions. For the full network, Nan'an fluctuated in connectivity, while Sibolga became progressively more disconnected and Lubin became more connected from 1975 through 1976-1990, then grew more sprawly from 1976-1990 onwards. Nan'an and Sibolga have been growing further apart in their street-network character since 1975.